8.Only after many years of hard work ____ that money alone does not lead to happiness and success.

　　A) I did realize B) had I realized

　　C) did I realize D) I had realized

　　9.When automation is introduced into the factory, all the work done by hand will ____ the assembly line.

　　A) take the place of B) replace

　　C) be attributed to D) give way to

　　10.The travelers were ready to enjoy the spectacular tidal waves when suddenly a thick fog came up and ____ the whole scene.

　　A) blurred B) belittled

　　C) banned D) collapsed

　　11.A healthy life is frequently thought to be__with the open countryside and homegrown food.

　　A)tied B)bound C)involved D)associated

　　12.Convenience foods which are already prepared for cooking are__ in grocery stores.

　　A)ready B)approachable C)probable D)available

　　13.The shy girl felt __ and uncomfortable when she could not answer her teacher's questions.

　　A)amazed B)awkward C)curious D)amused

　　14.Only a few people have ______ to the full facts of the incident.

　　A) access B) resort C) contact D) assess

　　15.There is no ______ evidence that people can control their dreams, at least in experimental situations in a lab.

　　A)attraction　B)appointment　C)access　D)solid